/**
 * @file The lane pipeline map: a horizontal chain of stage nodes coloured by
 * state. Layout is computed from the node list (flex + connectors), never from
 * hardcoded coordinates, so a lane can use a longer or shorter template without
 * touching this component. Every state but `current` shares one visual
 * language — coloured border, coloured text, a translucent wash of the same
 * colour — so status colour means the same thing everywhere in the app, not
 * a different shade per component. `current` is the sole solid fill, in the
 * app's own accent colour: the one state that gets to look bolder than the
 * rest, because it answers "where am I right now". "passed without
 * evidence" is its own colour: a stage the agent claimed but left no
 * artifact for is not the same as a stage that is genuinely done. A
 * `detected` node (the server's heuristic saw tool-event evidence but the
 * agent never declared it) gets a FOURTH treatment — thin dashed warning,
 * no fill — because it must never be mistaken for a real declaration.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import type { LaneNode } from "../../lib/types";

const STATE_CLASS: Record<LaneNode["state"], string> = {
  done: "border-status-success/60 text-status-success bg-status-success/10",
  current: "border-accent bg-accent text-white ring-2 ring-accent/30 shadow-sm",
  "passed-no-evidence": "border-status-warning/60 text-status-warning bg-status-warning/10",
  failed: "border-status-danger/60 text-status-danger bg-status-danger/10",
  pending: "border-border-light text-fg-muted bg-transparent",
};

// Thin dashed border and no fill keep an inference visually lighter than
// every outlined state above — so it never reads as more certain than a claim.
const DETECTED_CLASS = "border-dashed border-status-warning/50 text-status-warning bg-transparent";

export default function PipelineMap({
  nodes,
  detectedSignal,
}: {
  nodes: LaneNode[];
  detectedSignal?: string | null;
}) {
  if (!nodes.length) return <div className="text-xs text-fg-muted">no pipeline</div>;
  return (
    // The map spans the panel: every node takes an equal share and the
    // connectors absorb the slack, so the pipeline reads as one track across
    // the width rather than a short cluster hugging the left edge.
    <div className="flex w-full items-center py-1">
      {nodes.map((n, i) => (
        <div key={n.id} className="flex min-w-0 flex-1 items-center">
          <div
            data-testid={`pipeline-node-${n.id}`}
            data-state={n.state}
            data-detected={n.detected ? "true" : undefined}
            title={
              n.detected && detectedSignal
                ? `${n.label} ← ${detectedSignal}`
                : `${n.label} — ${n.state}`
            }
            className={`flex min-w-0 flex-1 items-center justify-center gap-1.5 rounded-full border px-2 py-1.5 text-[11px] ${n.detected ? DETECTED_CLASS : STATE_CLASS[n.state]}`}
          >
            <span className="shrink-0 text-[13px] leading-none">{n.icon}</span>
            <span className="truncate">{n.label}</span>
          </div>
          {i < nodes.length - 1 && <div className="h-px w-2 shrink-0 bg-surface-3 sm:w-3" />}
        </div>
      ))}
    </div>
  );
}
